Core-shell materials,as a kind of composite catalyst,are composed of core and shell,which show excellent synergistic effect and new characteristics.SiO2 is an ideal shell material for developing core-shell catalysts because of its advantages such as non-toxicity,chemical inertness,optical transparency,simplicity of modification,and low cost.In this paper,the preparation methods of SiO2 coated core-shell catalysts,including the sol-gel approach,template method,self-assembly process,and surface deposition method were introduced in detail.Besides,the applications of SiO2 coated core-shell catalysts in heterogeneous catalysis,such as shape selective catalysis,reducing the loss of active components,preventing the aggregation of nanoparticles and sintering were discussed.The future development trend of core-shell catalysts coated with SiO2 was pointed out.
维普
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